measurements & dates

CCAM Type 1 will have a lesion measuring (1)_______ than (2)__ cm.

1. Greater

2. 2

CCAM Type II will have multiple lesions measuring approximately __ cm.

1.5

CCAM Type III will have multiple lesions measuring __-__ mm.

0.5 - 5

The most sensitive period for cardiac development in the 1st trimester is between __-__ weeks.

3.5 - 6.5

Circulation has begun at the end of week __.

3

Division of the 4 chambers occurs during weeks __-__ of fetal development.

4 - 5

The heart will begin to beat at week __.

5

The heart takes up what fraction of the chest?

1/3

What is the normal ratio for lung maturity using the Lecithin-Sphingomyelin ratio?

Greater than 2:1

The axis of the heart will be at a __ degree angle.

45

What fraction of babies born with ASD have secundum defects?

8/10

An azygous vein will be approximately what fraction the size of the SVC?

1/3

Orbital distance will increase from (1)__ mm at 12 weeks to (2)__ mm at term.

1. 13

2. 59

Orbital distance will increase from 13 mm at (1)__ weeks to 59 mm at (2)____.

1. 12

2. Term

What weeks can cleft lip/palate occur during?

6 - 10

Choroid plexus cysts will often disappear by __ weeks.

26

Acrania can be detected as early as __-__ weeks.

10 - 14

Anencephaly can be detected as early as __-__ weeks.

10 - 14

Diagnosis of agenesis and hypoplasia of the cerebellar vermis should not be made prior to week __

18

With cystic hygroma, any posterior neck thickness measuring (1)_______ than (2)__ mm, with or without septations, should be followed.

1. Greater

2. 3

What does a normal cisterna magna measure?

3 - 10 mm

An enlarged lateral ventricle will measure greater than __ mm.

10

An enlarged third ventricle affected by ventriculomegaly will be dilated greater than __ mm.

3